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Claude Code errors / Auth

API Error: 401 authentication_error: Invalid bearer token

platform: Claude Code / category: Auth / code: 401 / versions: 2.0.28

Cause

A regression in v2.0.28 made the stored bearer token invalid or unable to refresh, persisting across logout/login.

Fix

Run 'claude logout' then 'claude login' to force a new token. If it persists, remove ~/.claude/claude.json and any ANTHROPIC_AUTH_TOKEN/ANTHROPIC_BASE_URL env vars, reinstall with npm install -g @anthropic-ai/claude-code, and authenticate again.

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